<div class="widget_box"><table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td height="30" bgcolor="#CCCCCC">&nbsp;标签：</td>
  </tr>
  <tr>
    <td><div class="tag_list"><?php echo $tag_str; ?></div></td>
  </tr>
</table>
</div>